"I will not be at the fight this Saturday to cheer Canelo to victory since I have voluntarily admitted myself into a treatment facility," De La Hoya said in the statement. "I explained this to Canelo and he understood that my health and long term recovery from my disease must come first."

The 40-year-old De La Hoya -- who admitted two years ago that he struggled with alcoholism and also acknowledged past drug use -- recently told the Los Angeles Times that his substance abuse battle continues. "The fight life, that was easy. This is a battle I have every day."